EP0553003A1 - Method for making a curved laminated windscreen of glass - Google Patents

Method for making a curved laminated windscreen of glass Download PDF

Info

Publication number
EP0553003A1
EP0553003A1 EP93400077A EP93400077A EP0553003A1 EP 0553003 A1 EP0553003 A1 EP 0553003A1 EP 93400077 A EP93400077 A EP 93400077A EP 93400077 A EP93400077 A EP 93400077A EP 0553003 A1 EP0553003 A1 EP 0553003A1
Authority
EP
European Patent Office
Prior art keywords
glass
bending
layer
glass sheet
ink
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93400077A
Other languages
German (de)
French (fr)
Other versions
EP0553003B1 (en
Inventor
Manfred Gillner
Luc Vanaschen
Hubert Havenith
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vegla Vereinigte Glaswerke GmbH
Saint Gobain Vitrage SA
Original Assignee
Vegla Vereinigte Glaswerke GmbH
Saint Gobain Vitrage SA
Saint Gobain Vitrage International SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vegla Vereinigte Glaswerke GmbH, Saint Gobain Vitrage SA, Saint Gobain Vitrage International SA filed Critical Vegla Vereinigte Glaswerke GmbH
Publication of EP0553003A1 publication Critical patent/EP0553003A1/en
Application granted granted Critical
Publication of EP0553003B1 publication Critical patent/EP0553003B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/03—Re-forming glass sheets by bending by press-bending between shaping moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10899—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin
    • B32B17/10935—Making laminated safety glass or glazing; Apparatus therefor by introducing interlayers of synthetic resin as a preformed layer, e.g. formed by extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10009—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets
    • B32B17/10036—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing characterized by the number, the constitution or treatment of glass sheets comprising two outer glass sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10247—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10165—Functional features of the laminated safety glass or glazing
    • B32B17/10247—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons
    • B32B17/10256—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques
    • B32B17/10266—Laminated safety glass or glazing containing decorations or patterns for aesthetic reasons created by printing techniques on glass pane
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B17/00—Layered products essentially comprising sheet glass, or glass, slag, or like fibres
    • B32B17/06—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material
    • B32B17/10—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin
    • B32B17/10005—Layered products essentially comprising sheet glass, or glass, slag, or like fibres comprising glass as the main or only constituent of a layer, next to another layer of a specific material of synthetic resin laminated safety glass or glazing
    • B32B17/10807—Making laminated safety glass or glazing; Apparatus therefor
    • B32B17/10889—Making laminated safety glass or glazing; Apparatus therefor shaping the sheets, e.g. by using a mould
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B23/00—Re-forming shaped glass
    • C03B23/02—Re-forming glass sheets
    • C03B23/023—Re-forming glass sheets by bending
    • C03B23/025—Re-forming glass sheets by bending by gravity
    • C03B23/0252—Re-forming glass sheets by bending by gravity by gravity only, e.g. sagging
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
    • C03C27/06—Joining glass to glass by processes other than fusing
    • C03C27/10—Joining glass to glass by processes other than fusing with the aid of adhesive specially adapted for that purpose
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina

Definitions

  • the present invention relates to a method for manufacturing a curved laminated glass pane in which one of the two individual glass sheets receives, on the surface contiguous to the thermoplastic intermediate layer, in selected areas, a layer of baking ink which is baked before the twin bending of the glass sheets during a preliminary heat treatment operation.
  • thermoplastic intermediate layer When curved laminated glazings must receive a baking ink, on an internal surface, that is to say on a surface contiguous to the thermoplastic intermediate layer, it is not possible to bake the layer of enamel-like ink during the bending operation.
  • the baking inks actually contain organic components which form, at baking temperatures, gaseous reaction products which cannot escape from the intermediate space provided between the two sheets of glass. In addition, there is an increased risk that the two glass sheets will adhere to each other during the melting of the ink to be baked.
  • the procedure is in principle as follows: before bending the pair of glass sheets, the individual printed glass sheet is laid first, flat, with the printed surface facing upwards, individually, in a process of heat treatment to melt the enamel layer and bake it. After cooling, this glass sheet carrying the baked enamel layer is assembled with the second glass sheet and the two glass sheets are bent together, the reaction products are no longer released in this joint bending process and the adhesion mutual separation of the two sheets is avoided by a powdery separating agent which is removed by washing after the bending and before the subsequent treatment giving the laminated glazing.
  • the object of the invention is to provide a simple process in practice for the production of curved automobile glazing comprising an internal layer of a baking ink, which allows the manufacture of optically flawless laminated glazing without disturbing deformations.
  • this individual glass sheet is placed with its coated side up on the individual glass sheet provided for the interior side, the pair of glass sheets is subjected to a pre-bending on a form of annular bending by melting and baking the ink simultaneously, after cooling the pre-curved glass sheets, a heat-resistant separating agent is applied to the individual glass sheet which has received the layer of baking ink, the two individual glass sheets are swapped and then the two pre-curved glass sheets are bent together with the layer of baking ink facing inwards, on an annular bending shape corresponding to the final shape of the glass sheet external to give it the final form.
  • the method according to the invention therefore takes advantage of the bending process usually used for the manufacture of curved laminated glazing and employing gravity bending of the pair of glass sheets on a bending ring, in order also to produce this way the cooking process.
  • the individual glass sheet provided with the ink layer ideally supported regularly during the cooking operation, but, as soon as the ink layer is cooked, a pre-bending of the coated glass sheet is carried out, so that the subsequent final bending operation can be carried out under the best conditions, that is to say if necessary at a slightly lower temperature and / or with shorter bending. Therefore, the danger of sticking of the two glass sheets by the ink to be cooked during fusion is further reduced.
  • a bending form is used as the annular bending form for the baking operation, the bending surface of which comes into contact with the glass sheet corresponds to the final shape of the sheet of glass.
  • internal glass laminated glazing while, for the second bending operation, a form of annular bending is used, the bending surface of which corresponds to the final shape of the external glass sheet.
  • the method according to the invention is successfully used for the most different objectives.
  • it can be used in the manufacture of laminated glazings, in which one of the two individual glass sheets is provided with a decoration frame consisting of a baking ink on its surface contiguous to the thermoplastic intermediate layer. Glazing with an opaque decoration frame is always necessary when they are connected to the body by gluing to the window frame.
  • these decorative frames may be appropriate to arrange these decorative frames not, as is customary, on the exterior surface of the laminated glazing facing inwards, but on the contrary inside the laminated glazing. It has proven to be particularly advantageous to use the method for the manufacture of an electrically heatable laminated glazing in which the heating resistor consists of a layer of electrically conductive metal printed and baked.
  • the face of the individual external glass sheet facing outward in the laminated glazing will be described below and as a whole by face I finished once laid, while the face of this individual external glass sheet contiguous to the thermoplastic intermediate layer will be qualified as face II.
  • the face III will be the face of the individual glass sheet facing the interior of the vehicle and contiguous to the thermoplastic intermediate layer.
  • the side of this internal glass sheet facing the interior of the vehicle will be called side IV.
  • the planar individual glass sheet provided for the external glass sheet in the finished laminated glazing receives, by screen printing, on side II, first of all an impression of decoration in the form of a peripheral frame made of baking ink.
  • the printed ink is dried.
  • two strip-shaped electrodes made of an ink containing metallic silver are printed along two edges opposite one another, these electrodes must be used by the series of current supply electrodes for the heating layer.
  • This printed conductive silver layer is initially also subjected to a drying operation.
  • the individual external glass sheet thus prepared is now applied, with its printed side II facing upwards, to the individual glass sheet which will be turned inwards thereafter, in particular on side IV thereof. .
  • the pair of glass sheets is then placed on an annular bending form, the bending surface of which corresponds to the final shape of the face III of the subsequent internal glass sheet.
  • the pair of glass sheets thus arranged together with the annular bending form mounted on a mobile carriage are moved through a conventional bending oven in which the glass sheets adapt to the bending form under the effect of their own weight when they reach the bending temperature.
  • the decorative layer and the electrically conductive layers are melted and baked in the glass surface.
  • the glass sheets When the glass sheets are taken out of the bending oven, they are allowed to cool.
  • the upper glass sheet with the baked layers receives a powdery separating agent, for example talc.
  • the upper glass sheet is lifted and is deposited, in this position, that is to say with the side I down, on another form of annular bending, the bending surface of which differs slightly from the surface of the bending shape used previously and corresponds exactly to the final shape of the side I of the glass sheet which will later be the external glass sheet.
  • the other glass sheet which was directly on the bending form during the cooking operation so that now, the side III rests on the side II.
  • the pair of glass sheets is ironed with the annular shape through the bending furnace where it acquires its final shape.
  • a decorative layer in the form of a frame consisting of baking ink on the side II of the glass sheet turned towards the outside and the ink layer is dried.
  • a conductive network is also printed by screen printing, in a second printing operation, on side II, which is made up, in a known manner, of narrow conductive strips, which lead to collectors arranged laterally. This printed conductive layer is also subjected to a drying operation.
  • the printed glass sheet with the printed side II upwards, is placed on the side IV of the other glass sheet.
  • the two glass sheets are now, as described in Example 1, first pre-bent on a first form of annular bending whose bending surface exactly corresponds to the shape of the glass sheet turned towards the interior of finished laminated glazing. In this first bending process, the printed layers are baked simultaneously. After the pair of pre-curved glass sheets has cooled, the two individual glass sheets are swapped and are bent in their final mutual arrangement on a second form of annular bending whose bending surface exactly corresponds to the shape of the glass sheet of the finished laminated glazing turned outwards.
  • the curved laminated glazings according to the invention can be used as glazings for transport vehicles, in particular motor vehicles, trains, planes, or even as curved laminated glazings for the building industry.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Joining Of Glass To Other Materials (AREA)
  • Laminated Bodies (AREA)
  • Re-Forming, After-Treatment, Cutting And Transporting Of Glass Products (AREA)

Abstract

Process for the manufacture of a curved windowpane made of laminated glass, in which one of the two individual sheets of glass receives a layer of curable ink on the surface adjoining the intermediate thermoplastic layer. The curable ink is applied onto the inner surface of the individual sheet of glass intended for the outer side. The sheet of glass provided with the dried ink is placed, with the layer uppermost, on the individual sheet of glass intended for the inner side. The pair of sheets of glass is precurved, in this arrangement, on a bending ring, with simultaneous curing of the ink layer. The two sheets of glass are next changed round and are curved definitively in this changed arrangement in which the ink layer is situated inside, in a second curving operation, on a bending ring corresponding to the final shape of the outer sheet of glass.

Description

La présente invention concerne un procédé de fabrication d'un vitrage bombé en verre feuilleté dans lequel une des deux feuilles de verre individuelles reçoit, sur la surface contiguë à la couche intermédiaire thermoplastique, dans des zones choisies, une couche d'encre à cuire qui est cuite avant le bombage jumelé des feuilles de verre au cours d'une opération de traitement thermique préalable.The present invention relates to a method for manufacturing a curved laminated glass pane in which one of the two individual glass sheets receives, on the surface contiguous to the thermoplastic intermediate layer, in selected areas, a layer of baking ink which is baked before the twin bending of the glass sheets during a preliminary heat treatment operation.

Lorsque des vitrages feuilletés bombés doivent recevoir une encre à cuire, sur une surface interne, c'est-à-dire sur une surface contiguë à la couche intermédiaire thermoplastique, il n'est pas possible d'effectuer la cuisson de la couche d'encre du genre émail au cours de l'opération de bombage. Les encres à cuire contiennent en fait des composants organiques qui forment, aux températures de cuisson, des produits de réaction gazeux qui ne peuvent pas s'échapper de l'espace intermédiaire prévu entre les deux feuilles de verre. En outre, il existe un risque accru que les deux feuilles de verre adhèrent l'une à l'autre au cours de la fusion de l'encre à cuire.When curved laminated glazings must receive a baking ink, on an internal surface, that is to say on a surface contiguous to the thermoplastic intermediate layer, it is not possible to bake the layer of enamel-like ink during the bending operation. The baking inks actually contain organic components which form, at baking temperatures, gaseous reaction products which cannot escape from the intermediate space provided between the two sheets of glass. In addition, there is an increased risk that the two glass sheets will adhere to each other during the melting of the ink to be baked.

Le bombage jumelé avec cuisson simultanée de la couche d'émail est certes décrit comme un procédé possible dans le document EP 0 013 970 B1, mais uniquement dans le cas où l'encre à cuire est appliquée dans une zone centrale partielle du vitrage. Dans le cas de cuisson et de bombage jumelés, en fait, les deux feuilles de verre s'entrebâillent légèrement en raison des températures élevées de leurs surfaces externes comparativement à la température de leurs surfaces internes, permettent ainsi le dégagement des gaz de réaction et empêchent l'adhésion mutuelle des deux feuilles de verre. Par contre, lorsque l'encre à cuire s'étend sur de grandes zones superficielles, ce procédé n'est pas utilisable.Bending twinned with simultaneous baking of the enamel layer is certainly described as a possible process in document EP 0 013 970 B1, but only in the case where the ink to be baked is applied in a partial central zone of the glazing. In the case of twin baking and bending, in fact, the two glass sheets slightly open due to the high temperatures of their external surfaces compared to the temperature of their internal surfaces, thus allowing the release of reaction gases and preventing mutual adhesion of the two glass sheets. On the other hand, when the ink to be cooked spreads over large surface areas, this method cannot be used.

Dans le cas de grandes surfaces d'impression sur l'une des faces internes d'un vitrage feuilleté, on procède en principe de la manière suivante : avant le bombage de la paire de feuilles de verre, on soumet tout d'abord la feuille de verre individuelle imprimée, à plat, dont la surface imprimée est tournée vers le haut, individuellement, à un procédé de traitement thermique pour faire fondre la couche d'émail et la cuire. Après refroidissement, cette feuille de verre portant la couche d'émail cuite est assemblée avec la seconde feuille de verre et les deux feuilles de verre sont bombées ensemble, les produits de réaction ne sont plus libérés dans ce procédé de bombage conjoint et l'adhérence mutuelle des deux feuilles est évitée par un agent de séparation pulvérulent qui est éliminé par lavage après le bombage et avant le traitement ultérieur donnant le vitrage feuilleté.In the case of large printing surfaces on one of the internal faces of laminated glazing, the procedure is in principle as follows: before bending the pair of glass sheets, the individual printed glass sheet is laid first, flat, with the printed surface facing upwards, individually, in a process of heat treatment to melt the enamel layer and bake it. After cooling, this glass sheet carrying the baked enamel layer is assembled with the second glass sheet and the two glass sheets are bent together, the reaction products are no longer released in this joint bending process and the adhesion mutual separation of the two sheets is avoided by a powdery separating agent which is removed by washing after the bending and before the subsequent treatment giving the laminated glazing.

Ce procédé qui a été divulgué, par exemple, par le document DE 39 20 573 A1 et qui consiste à cuire d'abord, dans une étape préalable du procédé, la couche d'émail sur la feuille de verre plane, impose des exigences élevées au four de cuisson approprié à l'opération. En effet la feuille de verre ne doit pas seulement rester absolument plane et sans déformation, elle ne peut pas non plus présenter de tensions internes, car celles-ci entraînent des déformations perturbatrices au cours du procédé de bombage ultérieur. On a montré à titre d'exemple que le transport des feuilles de verre chaudes sur des rouleaux de transport pouvait déjà entraîner d'infimes déformations de sorte que, par exemple, les pare-brise fabriqués par cette technique connue ne permettent pas de répondre aux stricts critères de qualité optique.This process which has been disclosed, for example, by document DE 39 20 573 A1 and which consists in first baking, in a preliminary stage of the process, the layer of enamel on the flat glass sheet, places high demands in the appropriate cooking oven. In fact, the glass sheet must not only remain absolutely flat and without deformation, it cannot present internal stresses either, since these cause disturbing deformations during the subsequent bending process. It has been shown by way of example that the transport of hot glass sheets on transport rollers could already cause minute deformations so that, for example, the windshields produced by this known technique do not make it possible to respond to the strict optical quality criteria.

L'invention a pour but de procurer un procédé simple en pratique pour la fabrication de vitrages automobiles bombés comportant une couche interne d'une encre à cuire, qui permet la fabrication de vitrages feuilletés optiquement irréprochables sans déformations perturbatrices.The object of the invention is to provide a simple process in practice for the production of curved automobile glazing comprising an internal layer of a baking ink, which allows the manufacture of optically flawless laminated glazing without disturbing deformations.

Suivant le procédé de l'invention, après l'application de l'encre à cuire sur la surface interne de la feuille de verre individuelle prévue pour le côté extérieur et séchage immédiat, on pose cette feuille de verre individuelle avec sa face revêtue vers le haut sur la feuille de verre individuelle prévue pour le côté intérieur, on soumet la paire de feuilles de verre à un pré-bombage sur une forme de bombage annulaire en faisant fondre et en cuisant l'encre simultanément, on applique, après refroidissement des feuilles de verre pré-bombées, sur la feuille de verre individuelle qui a reçu la couche d'encre à cuire, un agent de séparation résistant à la chaleur, on permute les deux feuilles de verre individuelles puis on bombe conjointement les deux feuilles de verre pré-bombées avec la couche d'encre à cuire tournée vers l'intérieur, sur une forme de bombage annulaire correspondant à la forme finale de la feuille de verre externe pour lui conférer la forme définitive.According to the method of the invention, after the application of the ink to bake on the internal surface of the individual glass sheet provided for the side exterior and immediate drying, this individual glass sheet is placed with its coated side up on the individual glass sheet provided for the interior side, the pair of glass sheets is subjected to a pre-bending on a form of annular bending by melting and baking the ink simultaneously, after cooling the pre-curved glass sheets, a heat-resistant separating agent is applied to the individual glass sheet which has received the layer of baking ink, the two individual glass sheets are swapped and then the two pre-curved glass sheets are bent together with the layer of baking ink facing inwards, on an annular bending shape corresponding to the final shape of the glass sheet external to give it the final form.

Le procédé selon l'invention met donc à profit le procédé de bombage habituellement utilisé pour la fabrication de vitrages feuilletés bombés et mettant en oeuvre un bombage par gravité de la paire de feuilles de verre sur un anneau de bombage, afin de réaliser également de cette manière le processus de cuisson. De la sorte, non seulement la feuille de verre individuelle dotée de la couche d'encre est soutenue régulièrement de manière idéale au cours de l'opération de cuisson, mais, dès la cuisson de la couche d'encre, un pré-bombage de la feuille de verre revêtue est effectué, si bien que l'opération de bombage finale ultérieure peut être réalisée dans les meilleures conditions, c'est-à-dire le cas échéant à une température un peu plus basse et/ou avec des temps de bombage plus courts. De ce fait, le danger de collage des deux feuilles de verre par l'encre à cuire en cours de fusion est encore réduit.The method according to the invention therefore takes advantage of the bending process usually used for the manufacture of curved laminated glazing and employing gravity bending of the pair of glass sheets on a bending ring, in order also to produce this way the cooking process. In this way, not only is the individual glass sheet provided with the ink layer ideally supported regularly during the cooking operation, but, as soon as the ink layer is cooked, a pre-bending of the coated glass sheet is carried out, so that the subsequent final bending operation can be carried out under the best conditions, that is to say if necessary at a slightly lower temperature and / or with shorter bending. Therefore, the danger of sticking of the two glass sheets by the ink to be cooked during fusion is further reduced.

Dans un développement avantageux de l'invention, on utilise à titre de forme de bombage annulaire pour l'opération de cuisson une forme de bombage dont la surface de bombage venant en contact avec la feuille de verre correspond à la forme finale de la feuille de verre interne du vitrage feuilleté, tandis que, pour la deuxième opération de bombage, on utilise une forme de bombage annulaire dont la surface de bombage correspond à la forme finale de la feuille de verre externe. De cette manière, on obtient une paire de feuilles de verre bombées dans laquelle, malgré l'opération de cuisson préalable, les deux feuilles de verre individuelles occupent une conformité optimale au niveau de leurs faces internes superposées et dans laquelle on évite de manière certaine des déformations des feuilles de verre qui entraînent des défauts de déflexion optiques ou des défauts dioptriques.In an advantageous development of the invention, a bending form is used as the annular bending form for the baking operation, the bending surface of which comes into contact with the glass sheet corresponds to the final shape of the sheet of glass. internal glass laminated glazing, while, for the second bending operation, a form of annular bending is used, the bending surface of which corresponds to the final shape of the external glass sheet. In this way, a pair of curved glass sheets is obtained in which, despite the prior baking operation, the two individual glass sheets occupy optimum conformity at the level of their superposed internal faces and in which certain deformations of the glass sheets which cause optical deflection defects or dioptric defects.

Le procédé selon l'invention s'utilise avec succès pour les objectifs les plus différents. Par exemple, il peut être utilisé dans la fabrication de vitrages feuilletés, dans lesquels une des deux feuilles de verre individuelles est dotée d'un cadre de décoration constitué d'une encre à cuire sur sa surface contiguë à la couche intermédiaire thermoplastique. Des vitrages dotés d'un cadre de décoration opaque sont toujours nécessaires lorsqu'ils sont reliés à la carrosserie par collage au cadre de la fenêtre. Dans divers cas, il peut être approprié de disposer ces cadres de décoration non pas, comme cela se pratique d'habitude, sur la surface extérieure du vitrage feuilleté tournée vers l'intérieur, mais au contraire à l'intérieur du vitrage feuilleté. Il s'est avéré particulièrement avantageux d'utiliser le procédé pour la fabrication d'un vitrage feuilleté chauffable électriquement dans lequel la résistance chauffante est constituée d'une couche de métal conducteur de l'électricité imprimée et cuite. Dans de tels vitrages feuilletés chauffants, on peut prévoir, en plus des couches conductrices cuites, des couches de décoration en forme de cadre, ou à deux dimensions, également constituées d'une encre à cuire. Pour la fabrication de telles vitres chauffantes, plusieurs opérations d'impression suivie chacune d'une opération de séchage immédiate sont fréquemment nécessaires. On a constaté que le procédé selon l'invention convient de manière remarquable même pour des vitrages feuilletés aussi complexes.The method according to the invention is successfully used for the most different objectives. For example, it can be used in the manufacture of laminated glazings, in which one of the two individual glass sheets is provided with a decoration frame consisting of a baking ink on its surface contiguous to the thermoplastic intermediate layer. Glazing with an opaque decoration frame is always necessary when they are connected to the body by gluing to the window frame. In various cases, it may be appropriate to arrange these decorative frames not, as is customary, on the exterior surface of the laminated glazing facing inwards, but on the contrary inside the laminated glazing. It has proven to be particularly advantageous to use the method for the manufacture of an electrically heatable laminated glazing in which the heating resistor consists of a layer of electrically conductive metal printed and baked. In such heated laminated glazing, it is possible to provide, in addition to the baked conductive layers, decorative layers in the form of a frame, or in two dimensions, also consisting of a baking ink. For the production of such heated panes, several printing operations followed each by an immediate drying operation are frequently necessary. It has been found that the method according to the invention is remarkably suitable even for equally complex laminated glazing.

On décrira à présent deux exemples de réalisation dans lesquels le procédé selon l'invention s'applique.We will now describe two exemplary embodiments in which the method according to the invention applies.

Exemple 1Example 1

Il s'agit de fabriquer un pare-brise chauffant en verre feuilleté, dans lequel une des deux feuilles de verre individuelles est dotée d'une couche chauffante transparente à structure multicouche, sur sa face contiguë à la pellicule thermoplastique.This involves manufacturing a heated laminated glass windshield, in which one of the two individual glass sheets is provided with a transparent heating layer with a multilayer structure, on its face contiguous with the thermoplastic film.

Pour caractériser les diverses surfaces des deux feuilles de verre individuelles qui sont traitées pour former le vitrage feuilleté, on qualifiera ci-dessous et dans son ensemble par face I la face de la feuille de verre individuelle externe tournée vers l'extérieur dans le vitrage feuilleté fini une fois posé, tandis que la face de cette feuille de verre individuelle externe contiguë à la couche intermédiaire thermoplastique sera qualifiée de face II. Dans cette optique, la face III sera la face de la feuille de verre individuelle tournée vers l'intérieur du véhicule et contiguë à la couche intermédiaire thermoplastique. La face de cette feuille de verre interne tournée vers l'intérieur du véhicule sera qualifiée de face IV.To characterize the various surfaces of the two individual glass sheets which are treated to form the laminated glazing, the face of the individual external glass sheet facing outward in the laminated glazing will be described below and as a whole by face I finished once laid, while the face of this individual external glass sheet contiguous to the thermoplastic intermediate layer will be qualified as face II. In this perspective, the face III will be the face of the individual glass sheet facing the interior of the vehicle and contiguous to the thermoplastic intermediate layer. The side of this internal glass sheet facing the interior of the vehicle will be called side IV.

Dès que les deux feuilles de verre individuelles ont été découpées à la forme souhaitée, la feuille de verre individuelle plane prévue pour la feuille de verre externe dans le vitrage feuilleté fini reçoit par sérigraphie, sur la face II, tout d'abord une impression de décoration en forme de cadre périphérique constituée d'une encre à cuire. Au cours d'une opération de séchage, l'encre imprimée est séchée. Après séchage, dans une seconde opération d'impression sérigraphique, deux électrodes en forme de bandes constituées d'une encre contenant de l'argent métallique sont imprimées le long de deux bords opposés l'un à l'autre, ces électrodes devront servir par la suite d'électrodes d'alimentation de courant pour la couche chauffante. Cette couche d'argent conductrice imprimée est initialement soumise également à une opération de séchage.As soon as the two individual glass sheets have been cut to the desired shape, the planar individual glass sheet provided for the external glass sheet in the finished laminated glazing receives, by screen printing, on side II, first of all an impression of decoration in the form of a peripheral frame made of baking ink. During a drying operation, the printed ink is dried. After drying, in a second screen printing operation, two strip-shaped electrodes made of an ink containing metallic silver are printed along two edges opposite one another, these electrodes must be used by the series of current supply electrodes for the heating layer. This printed conductive silver layer is initially also subjected to a drying operation.

La feuille de verre individuelle externe ainsi préparée est à présent appliquée, avec sa face imprimée II tournée vers le haut, sur la feuille de verre individuelle qui sera tournée vers l'intérieur par la suite, en particulier sur la face IV de celle-ci. La paire de feuilles de verre est ensuite posée sur une forme de bombage annulaire, dont la surface de bombage correspond à la forme finale de la face III de la feuille de verre interne ultérieure. A présent, la paire de feuilles de verre ainsi disposées conjointement avec la forme de bombage annulaire montée sur un chariot mobile sont déplacées à travers un four de bombage usuel dans lequel les feuilles de verre s'adaptent à la forme de bombage sous l'effet de leur propre poids lorsqu'elles atteignent la température de bombage. Au cours de l'opération de bombage, la couche de décoration et les couches conductrices de l'électricité sont fondues et cuites dans la surface de verre.The individual external glass sheet thus prepared is now applied, with its printed side II facing upwards, to the individual glass sheet which will be turned inwards thereafter, in particular on side IV thereof. . The pair of glass sheets is then placed on an annular bending form, the bending surface of which corresponds to the final shape of the face III of the subsequent internal glass sheet. Now, the pair of glass sheets thus arranged together with the annular bending form mounted on a mobile carriage are moved through a conventional bending oven in which the glass sheets adapt to the bending form under the effect of their own weight when they reach the bending temperature. During the bending operation, the decorative layer and the electrically conductive layers are melted and baked in the glass surface.

Lorsque les feuilles de verre sont sorties du four de bombage, on les laisse refroidir. La feuille de verre supérieure dotée des couches cuites reçoit un agent de séparation pulvérulent, par exemple du talc. Ensuite, la feuille de verre supérieure est soulevée et est déposée, dans cette position, c'est-à-dire avec la face I vers le bas, sur une autre forme de bombage annulaire, dont la surface de bombage diffère légèrement de la surface de la forme de bombage utilisée antérieurement et correspond exactement à la forme finale de la face I de la feuille de verre qui sera ultérieurement la feuille de verre externe. On pose à présent, sur cette feuille de verre, l'autre feuille de verre, qui se trouvait directement sur la forme de bombage lors de l'opération de cuisson de sorte qu'à présent, la face III repose sur la face II. Dans cette disposition, la paire de feuilles de verre est repassée avec la forme annulaire à travers le four de bombage où elle acquiert sa forme définitive.When the glass sheets are taken out of the bending oven, they are allowed to cool. The upper glass sheet with the baked layers receives a powdery separating agent, for example talc. Then, the upper glass sheet is lifted and is deposited, in this position, that is to say with the side I down, on another form of annular bending, the bending surface of which differs slightly from the surface of the bending shape used previously and corresponds exactly to the final shape of the side I of the glass sheet which will later be the external glass sheet. Now put on this glass sheet, the other glass sheet, which was directly on the bending form during the cooking operation so that now, the side III rests on the side II. In this arrangement, the pair of glass sheets is ironed with the annular shape through the bending furnace where it acquires its final shape.

Dès que les feuilles de verre ont été bombées de cette manière, elles sont séparées l'une de l'autre et lavées. Selon un procédé de revêtement approprié, en particulier selon le procédé de pulvérisation cathodique dans un champ magnétique, un système multicouche conducteur de l'électricité est appliqué à présent sur la face II par dessus les couches cuites. Le reste du traitement s'effectue de la manière connue.As soon as the glass sheets have been bent in this way, they are separated from each other and washed. According to an appropriate coating process, in particular according to the sputtering process in a magnetic field, an electrically conductive multilayer system is now applied on side II over the baked layers. The rest of the processing is carried out in the known manner.

Exemple 2Example 2

Il s'agit de fabriquer une lunette arrière chauffable électriquement en verre feuilleté, dans laquelle la résistance chauffante est disposée à l'intérieur du verre feuilleté et est constituée de bandes conductrices d'une pâte à cuire qui ont été appliquées par impression et cuites.This involves manufacturing an electrically heated rear window in laminated glass, in which the heating resistor is arranged inside the laminated glass and consists of conductive strips of a baking paste which have been applied by printing and baked.

Après avoir découpé les deux feuilles de verre individuelles à la forme voulue, on commence à nouveau par imprimer par sérigraphie une couche de décoration en forme de cadre constituée d'une encre à cuire sur la face II de la feuille de verre tournée vers l'extérieur et on sèche la couche d'encre. Après le séchage, on imprime également par sérigraphie, dans une seconde opération d'impression, sur la face II, un réseau conducteur qui est constitué de manière connue de bandes conductrices étroites, qui débouchent sur des collecteurs disposés latéralement. Cette couche conductrice imprimée est également soumise à une opération de séchage.After cutting the two individual glass sheets to the desired shape, we again start by screen printing a decorative layer in the form of a frame consisting of baking ink on the side II of the glass sheet turned towards the outside and the ink layer is dried. After drying, a conductive network is also printed by screen printing, in a second printing operation, on side II, which is made up, in a known manner, of narrow conductive strips, which lead to collectors arranged laterally. This printed conductive layer is also subjected to a drying operation.

Ensuite, la feuille de verre imprimée, avec la face imprimée II vers le haut, est posée sur la face IV de l'autre feuille de verre. Les deux feuilles de verre sont à présent, comme décrit dans l'exemple 1, tout d'abord pré-bombées sur une première forme de bombage annulaire dont la surface de bombage correspond exactement à la forme de la feuille de verre tournée vers l'intérieur du vitrage feuilleté fini. Dans ce premier processus de bombage, on cuit simultanément les couches imprimées. Après refroidissement de la paire de feuilles de verre pré-bombées, les deux feuilles de verre individuelles sont permutées et sont bombées dans leur disposition mutuelle définitive sur une seconde forme de bombage annulaire dont la surface de bombage correspond exactement à la forme de la feuille de verre du vitrage feuilleté fini tournée vers l'extérieur.Then, the printed glass sheet, with the printed side II upwards, is placed on the side IV of the other glass sheet. The two glass sheets are now, as described in Example 1, first pre-bent on a first form of annular bending whose bending surface exactly corresponds to the shape of the glass sheet turned towards the interior of finished laminated glazing. In this first bending process, the printed layers are baked simultaneously. After the pair of pre-curved glass sheets has cooled, the two individual glass sheets are swapped and are bent in their final mutual arrangement on a second form of annular bending whose bending surface exactly corresponds to the shape of the glass sheet of the finished laminated glazing turned outwards.

Le reste du traitement devant donner le vitrage feuilleté se déroule de manière connue.The rest of the treatment to give the laminated glazing takes place in a known manner.

Les vitrages feuilletés bombés selon l'invention peuvent être utilisés en tant que vitrages pour véhicules de transport, notamment véhicules automobiles, trains, avions, ou encore en tant que vitrages feuilletés bombés pour le bâtiment.The curved laminated glazings according to the invention can be used as glazings for transport vehicles, in particular motor vehicles, trains, planes, or even as curved laminated glazings for the building industry.

Claims (5)

1.- Procédé de fabrication d'un vitrage bombé en verre feuilleté dans lequel une des deux feuilles de verre individuelles reçoit, sur la surface contiguë à la couche intermédiaire thermoplastique, dans des zones choisies, une couche d'encre à cuire qui est cuite avant le bombage jumelé des feuilles de verre dans une opération de traitement thermique préalable, caractérisé en ce que, après l'application de l'encre à cuire sur la surface interne de la feuille de verre individuelle prévue pour le côté extérieur et séchage immédiat, on pose cette feuille de verre individuelle avec sa face revêtue vers le haut sur la feuille de verre individuelle prévue pour le côté intérieur, on soumet la paire de feuilles de verre à un pré-bombage sur une forme de bombage annulaire en faisant fondre et en cuisant l'encre simultanément, on applique, après refroidissement des feuilles de verre pré-bombées, sur la feuille de verre individuelle qui a reçu la couche d'encre à cuire, un agent de séparation résistant à la chaleur, on permute les deux feuilles de verre individuelles puis on bombe conjointement les deux feuilles de verre pré-bombées avec la couche d'encre à cuire tournée vers l'intérieur, sur une forme de bombage annulaire correspondant à la forme finale de la feuille de verre externe pour lui conférer la forme définitive. 1.- Method of manufacturing a curved glazing in laminated glass in which one of the two individual glass sheets receives, on the surface contiguous to the thermoplastic intermediate layer, in selected areas, a layer of baking ink which is baked before the twin bending of the glass sheets in a preliminary heat treatment operation, characterized in that, after the application of the ink to be baked on the internal surface of the individual glass sheet provided for the exterior side and immediate drying, this individual glass sheet is placed with its coated side up on the individual glass sheet provided for the interior side, the pair of glass sheets is subjected to a pre-bending on a form of annular bending by melting and baking the ink simultaneously, after cooling the pre-curved glass sheets, it is applied to the individual glass sheet which has received the layer of ink to be bake, a heat resistant separating agent, the two individual glass sheets are swapped and then the two pre-curved glass sheets are bent together with the layer of baking ink facing inwards, on a bending form annular corresponding to the final shape of the outer glass sheet to give it the final shape. 2. - Procédé selon la revendication 1, caractérisé en ce qu'on utilise pour le pré-bombage de la paire de feuilles de verre, une forme de bombage dont la surface de bombage correspond à la forme finale de la surface de la feuille de verre interne contiguë à la couche intermédiaire. 2. - Method according to claim 1, characterized in that one uses for the pre-bending of the pair of glass sheets, a bending form whose bending surface corresponds to the final shape of the surface of the sheet of internal glass adjoining the intermediate layer. 3.- Emploi du procédé selon la revendication 1 ou 2 pour la fabrication de vitrages feuilletés bombés comportant un cadre de décoration disposé sur la face de la feuille de verre externe contiguë à la couche thermoplastique intermédiaire. 3. Use of the method according to claim 1 or 2 for the manufacture of curved laminated glazing comprising a decorative frame disposed on the face of the external glass sheet contiguous to the intermediate thermoplastic layer. 4.- Emploi du procédé selon la revendication 1 ou 2 pour la fabrication de vitrages feuilletés bombés chauffables électriquement, comportant des électrodes d'alimentation de courant cuites, disposées sur la surface de la feuille de verre externe contiguë à la couche thermoplastique intermédiaire et prévues pour une couche conductrice transparente appliquée ensuite selon un procédé sous vide. 4.- Use of the method according to claim 1 or 2 for the production of electrically heatable domed laminated glazing, comprising baked current supply electrodes, disposed on the surface of the external glass sheet contiguous to the intermediate thermoplastic layer and provided for a transparent conductive layer then applied according to a empty. 5.- Emploi du procédé selon la revendication 1 ou 2 pour la fabrication de vitrages feuilletés bombés chauffables électriquement comportant des conducteurs chauffants imprimés et cuits, disposés sur la face de la feuille de verre externe contiguë à la couche thermoplastique intermédiaire. 5. Use of the method according to claim 1 or 2 for the manufacture of electrically curved laminated glazed panes comprising printed and baked heating conductors disposed on the face of the outer glass sheet contiguous to the intermediate thermoplastic layer.
EP93400077A 1992-01-18 1993-01-14 Method for making a curved laminated windscreen of glass Expired - Lifetime EP0553003B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4201275 1992-01-18
DE4201275A DE4201275C1 (en) 1992-01-18 1992-01-18

Publications (2)

Publication Number Publication Date
EP0553003A1 true EP0553003A1 (en) 1993-07-28
EP0553003B1 EP0553003B1 (en) 1996-09-18

Family

ID=6449799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93400077A Expired - Lifetime EP0553003B1 (en) 1992-01-18 1993-01-14 Method for making a curved laminated windscreen of glass

Country Status (8)

Country Link
US (1) US5324373A (en)
EP (1) EP0553003B1 (en)
JP (1) JPH068727A (en)
KR (1) KR930016356A (en)
AT (1) ATE142992T1 (en)
CA (1) CA2087471A1 (en)
DE (2) DE4201275C1 (en)
ES (1) ES2093369T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2703043A1 (en) * 1993-03-26 1994-09-30 Saint Gobain Vitrage Int Composition for enamelling glass substrates, application to laminated glazing and products obtained
WO1994022779A2 (en) * 1993-03-26 1994-10-13 Saint-Gobain Vitrage International Method for fabricating laminated enamelled glazing, and enamelled composition used therefor
FR2705335A1 (en) * 1993-05-13 1994-11-25 Saint Gobain Vitrage Int Composition for enamelling glass substrates, application to laminated glazing and products obtained
WO1996030206A1 (en) * 1995-03-24 1996-10-03 Ford Motor Company Method to fabricate shaped laminated glass panes
FR3056147A1 (en) * 2016-09-21 2018-03-23 Saint-Gobain Glass France METHOD OF PRINTING ON AN OUTER FACE OF A SHEET GLAZING

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4316575C1 (en) * 1993-05-18 1994-07-07 Ver Glaswerke Gmbh Process for the production of a curved laminated glass pane, in particular a car glass pane
US6142642A (en) * 1995-06-29 2000-11-07 Cardinal Ig Company Bendable mirrors and method of manufacture
US6086210A (en) * 1995-06-29 2000-07-11 Cardinal Ig Company Bendable mirrors and method of manufacture
EP1051364B1 (en) 1997-10-31 2002-04-10 Cardinal CG Company Heat-bendable mirrors
DE10047576A1 (en) * 2000-09-22 2002-04-18 Schott Glas Production of glass ceramic parts and/or glass parts comprises deforming a glass ceramic blank and/or a glass blank using IR radiation
DE10105200A1 (en) * 2001-02-06 2002-08-14 Saint Gobain Method and device for bending glass sheets in pairs
US7832233B2 (en) * 2005-05-18 2010-11-16 Ferro Corporation Method of making staged burnout enamels for second surface firing of multilayer glass structures
US20090053534A1 (en) * 2007-08-21 2009-02-26 Robert Prunchak Coating compositions
US8411413B2 (en) * 2008-08-28 2013-04-02 Ioxus, Inc. High voltage EDLC cell and method for the manufacture thereof
MX2015007463A (en) 2012-12-14 2015-09-16 Ferro Corp Method of making multilayer glass structure.
EP3313792A1 (en) 2015-06-26 2018-05-02 Corning Incorporated Apparatus and method for reforming sheet material
US11260629B2 (en) * 2017-05-15 2022-03-01 Corning Incorporated Laminate having organic ink decoration and high impact resistance
CN112878581B (en) * 2021-01-05 2021-10-08 广东南星玻璃有限公司 Processing method of wave-curved arc-shaped hollow glass
DE102021134016B4 (en) 2021-12-21 2024-06-13 Webasto SE Method for producing a laminated glass pane

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762902A (en) * 1969-08-25 1973-10-02 Ppg Industries Inc Shaping coating and tempering glass
US4009064A (en) * 1976-02-20 1977-02-22 Corning Glass Works Method of forming laminated curvilinear glass sheet
EP0013970A1 (en) * 1979-01-25 1980-08-06 Saint Gobain Vitrage International Wind-shield for vehicles and process for its manufacture
EP0351739A2 (en) * 1988-07-18 1990-01-24 Asahi Glass Company Ltd. Method of and apparatus for bending glass plates for a laminated glass
DE3920573A1 (en) * 1989-06-23 1991-01-10 Ver Glaswerke Gmbh COOLING CHANNEL FOR CONTROLLED COOLING OF THEN GLASS PANELS

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3001901A (en) * 1955-12-01 1961-09-26 Libbey Owens Ford Glass Co Method of producing electrically conductive articles
US2944926A (en) * 1956-02-06 1960-07-12 Libbey Owens Ford Glass Co Electrically conductive windshield
US4277299A (en) * 1977-09-23 1981-07-07 Ppg Industries, Inc. Release molds for laminating bilayer safety glass
US4263350A (en) * 1979-12-31 1981-04-21 Ppg Industries, Inc. Silane release surfaces on glass
GB8431894D0 (en) * 1984-12-18 1985-01-30 Pilkington Brothers Plc Laminated windows for vehicles
DE3543694A1 (en) * 1985-12-11 1987-06-19 Leybold Heraeus Gmbh & Co Kg METHOD FOR PRODUCING CONTACT RAILS ON SUBSTRATES, ESPECIALLY ON DISC, AND DISC PRODUCED BY THE PROCESS
US4786784A (en) * 1987-02-17 1988-11-22 Libbey-Owens-Ford Co. Method for producing an electrically heated window assembly and resulting article
US4668270A (en) * 1986-09-11 1987-05-26 Ford Motor Company Method of making an electrically heated, glass vision unit
US4718932A (en) * 1986-11-24 1988-01-12 Ford Motor Company Method for making an electrically heatable windshield
US4744844A (en) * 1987-01-12 1988-05-17 Ford Motor Company Method of making a laminated windshield

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762902A (en) * 1969-08-25 1973-10-02 Ppg Industries Inc Shaping coating and tempering glass
US4009064A (en) * 1976-02-20 1977-02-22 Corning Glass Works Method of forming laminated curvilinear glass sheet
EP0013970A1 (en) * 1979-01-25 1980-08-06 Saint Gobain Vitrage International Wind-shield for vehicles and process for its manufacture
EP0351739A2 (en) * 1988-07-18 1990-01-24 Asahi Glass Company Ltd. Method of and apparatus for bending glass plates for a laminated glass
DE3920573A1 (en) * 1989-06-23 1991-01-10 Ver Glaswerke Gmbh COOLING CHANNEL FOR CONTROLLED COOLING OF THEN GLASS PANELS

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5605591A (en) * 1993-03-26 1997-02-25 Saint-Gobain Vitrage International Process for the preparation of a laminated enamelled glazing and enamel composition used
WO1994022779A2 (en) * 1993-03-26 1994-10-13 Saint-Gobain Vitrage International Method for fabricating laminated enamelled glazing, and enamelled composition used therefor
WO1994022779A3 (en) * 1993-03-26 1995-01-05 Saint Gobain Vitrage Method for fabricating laminated enamelled glazing, and enamelled composition used therefor
FR2703043A1 (en) * 1993-03-26 1994-09-30 Saint Gobain Vitrage Int Composition for enamelling glass substrates, application to laminated glazing and products obtained
FR2705335A1 (en) * 1993-05-13 1994-11-25 Saint Gobain Vitrage Int Composition for enamelling glass substrates, application to laminated glazing and products obtained
US5759220A (en) * 1995-03-24 1998-06-02 Ford Motor Company Method to fabricate shaped laminated glass panes
WO1996030206A1 (en) * 1995-03-24 1996-10-03 Ford Motor Company Method to fabricate shaped laminated glass panes
FR3056147A1 (en) * 2016-09-21 2018-03-23 Saint-Gobain Glass France METHOD OF PRINTING ON AN OUTER FACE OF A SHEET GLAZING
WO2018055268A1 (en) * 2016-09-21 2018-03-29 Saint-Gobain Glass France Method for printing on an exterior face of laminated glazing
CN109715396A (en) * 2016-09-21 2019-05-03 法国圣戈班玻璃厂 Method for being printed on the exterior face of laminated windows
US10913255B2 (en) 2016-09-21 2021-02-09 Saint-Gobain Glass France Method for printing on an exterior face of laminated glazing
RU2744958C2 (en) * 2016-09-21 2021-03-17 Сэн-Гобэн Гласс Франс Method for printing on the external surface of multiple glazing
CN109715396B (en) * 2016-09-21 2022-04-08 法国圣戈班玻璃厂 Method for printing on the outer face of a laminated glazing

Also Published As

Publication number Publication date
DE69304721T2 (en) 1997-04-03
DE69304721D1 (en) 1996-10-24
CA2087471A1 (en) 1993-07-19
US5324373A (en) 1994-06-28
DE4201275C1 (en) 1993-08-19
ATE142992T1 (en) 1996-10-15
KR930016356A (en) 1993-08-26
JPH068727A (en) 1994-01-18
EP0553003B1 (en) 1996-09-18
ES2093369T3 (en) 1996-12-16

Similar Documents

Publication Publication Date Title
EP0553003B1 (en) Method for making a curved laminated windscreen of glass
EP0353140B1 (en) Process to produce a curved glass
JP4395265B2 (en) Transparent laminated product
EP0396449B1 (en) Glazing with filtering band and production process
US6598426B2 (en) Method of making a vehicle window with opaque layer
EP0419321B1 (en) Laminated heating glass
EP1611064B1 (en) Method for crowning sheets of glass by pressing and suction
US4786784A (en) Method for producing an electrically heated window assembly and resulting article
EP1546047B1 (en) Method for bending coated glass using microwaves
EP0625422B1 (en) Method for making a curved laminated glass pane, particularly a car pane
FR2880343A1 (en) PROCESS FOR BOMBING GLASS SHEETS BY SUCTION
FR2707283A1 (en) Process and device for forming glass plates and application of this method to obtaining glazings of complex shapes.
CA2019486C (en) Process and apparatus for effecting curving and tempering by contact
FR2677637A1 (en) PROCESS FOR PREPARING GLASS SHEETS
US5759220A (en) Method to fabricate shaped laminated glass panes
BE1004164A3 (en) Glass substrate bearing an electric circuit and manufacturing method.
CA1337172C (en) Laminated glass with electro-conductive layer
CN1179130A (en) Method to fabricate shaped laminated glass panes
EP0465311B1 (en) Convex windscreen with electrical bus strips
JP2007507410A (en) Laminated glass bending
EP2090549A1 (en) Bending of sheets of glass

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE ES FR GB IT LU PT SE

17P Request for examination filed

Effective date: 19931218

17Q First examination report despatched

Effective date: 19950901

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: VEGLA VEREINIGTE GLASWERKE GMBH

Owner name: SAINT-GOBAIN VITRAGE

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE ES FR GB IT LU PT SE

REF Corresponds to:

Ref document number: 142992

Country of ref document: AT

Date of ref document: 19961015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 69304721

Country of ref document: DE

Date of ref document: 19961024

ITF It: translation for a ep patent filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2093369

Country of ref document: ES

Kind code of ref document: T3

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19961220

REG Reference to a national code

Ref country code: PT

Ref legal event code: SC4A

Free format text: AVAILABILITY OF NATIONAL TRANSLATION

Effective date: 19961126

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 19990115

Year of fee payment: 7

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000115

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20011010

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: PT

Payment date: 20111229

Year of fee payment: 20

Ref country code: LU

Payment date: 20111212

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20120125

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20120111

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20120118

Year of fee payment: 20

Ref country code: SE

Payment date: 20120112

Year of fee payment: 20

Ref country code: BE

Payment date: 20120126

Year of fee payment: 20

Ref country code: GB

Payment date: 20120111

Year of fee payment: 20

REG Reference to a national code

Ref country code: DE

Ref legal event code: R071

Ref document number: 69304721

Country of ref document: DE

REG Reference to a national code

Ref country code: PT

Ref legal event code: MM4A

Free format text: MAXIMUM VALIDITY LIMIT REACHED

Effective date: 20130114

BE20 Be: patent expired

Owner name: *SAINT-GOBAIN VITRAGE

Effective date: 20130114

Owner name: *VEGLA VEREINIGTE GLASWERKE G.M.B.H.

Effective date: 20130114

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

Expiry date: 20130113

REG Reference to a national code

Ref country code: SE

Ref legal event code: EUG

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK07

Ref document number: 142992

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130114

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20111229

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20130115

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20130113

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20130122